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प्रश्न
Give scientific reason.
Duck-billed platypus shows relationship with mammals.
उत्तर
- The duck-billed platypus is a connecting link between mammals and reptiles.
- It shows similarity with mammals due to the presence of mammary glands and hairs.
Therefore, Duck-billed platypus shows relationship with mammals.
संबंधित प्रश्न
State the connecting links between Peripatus with Annelida and Arthopoda.
Give two examples of vestigial organs in human beings and plants.
(a) Select the homologous structures from the combinations given below:
(i) Forelimbs of whales and bats
(ii) Tuber of potato and sweet potato
(iii) Eyes of octopus and mammals
(iv) Thorns of Bougainvillea and tendrils of Cucurbita
(b) State the kind of evolution they represent.
Study the following statements:-
I. Wings of birds and wings of bats are homologous organs.
II. Wings of birds and wings of insects are modified forelimbs.
III. Wings of birds and wings of insects are analogous organs.
IV. Wings of birds and forelimbs of horse are homologous organs.
The correct statements are
(A) I and II
(B) II and III
(C) III and IV
(D) I and IV
With the help of any two suitable examples explain the effect of anthropogenic actions on organic evolution.
If you are asked to select a group of two vegetables, out of the following, having homologous structures which one would you select?
(a) Carrot and radish
(b) Potato and sweet potato
(c) Potato and tomato
(d) Lady finger and potato
Differentiate between analogy and homology giving one example each of plant and animal respectively.
Which one of the following pairs of vegetables is an example of homologous structures?
(A) Potato and sweet potato
(B) Carrot and radish
(C) Carrot and tomato
(D) Tomato and radish
An example of homologous organs is
Select and write analogous structures from the list given below :
1) Wings of butterfly and birds
2) Vertebrate hearts
3) Tendrils of Bougainvillea and Cucurbita
4) Tubers of sweet potato and potato
Name two animals having homologous organs and two having analogous organs. Name these organs.
The wings of a housefly and the wings of a sparrow are an example of :
(a) analogous organs
(b) vestigial organs
(c) respiratory organs
(d) homologous organs
The organs P and Q of two animals have different structures but similar functions. On the other hand, the two organs R and S of two other animals have the same basic structure but different functions.
(a) What are the organs like P and Q known as?
(b) Name the organs like P and Q. Also name the animals which have such organs.
(c) What are the organs like R and S called?
(d) Name the organs like R and S. Also name the animals which have such organs.
You have potato, carrot, radish, sweet potato, tomato and ginger bought from the market in your jute bag. Identify two vegetables to represent the correct homologous structures.
(A) Potato and tomato
(B) Carrot and tomato
(C) Potato and sweet potato
(D) Carrot and radish
Write short notes based upon the information known to you.
Embryology
Write the names of those animals in whom the human body organs are functioning.
Answer the following question.
Wisdom teeth : Vestigial organs :: Lungfish : ....................
_______ is a connecting link between Annelida and Arthropoda.
With the help of diagrams, describe emasculation and bagging.
Very short answer question:
What is vestigeal organ?
Explain the importance of Anatomical evidences with examples.
Find an odd one out.
Find an odd one out.
Homologous organs and vestigial organs are examples of ______ type of evidence in evolution.
Select the CORRECT set of homologous organs.
Homologous organs are:
Cucurbits do not develop thick and woody stem as they are:
Basic principles of embryonic development were pronounced by:
Evolutionary convergence is the development of:
The process of mating of individuals, which are more closing related than the average of the population to which they belong is called ______.
The presence of gill slits, in the embryos of all vertebrates, supports the theory of ______.
Animal husbandry and plant breeding programmes are the examples of ______.
Appearance of antibiotic-resistant bacteria is an example of ______.
What were the characteristics of life forms that had been fossilised?
While creation and presence of variation is directionless, natural selection is directional as it is in the context of adaptation. Comment.
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
